Web接口开发与自动化测试

1.导入分页器库
2.查询表数据列出来
3.设置分页器每页显示数量
4.获取当前页码
5.处理非整数页码页面和超出范围页面
6.返回当前页面数据

from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger   # 分页器

def event_manage(request):
　　# 查询Event表所有数据
    event_list = Event.objects.all()
    username = request.session.get('user', '')
    # username = request.COOKIES.get('user', '')
　　# 注册分页器,event_list 分页数据,2 每页显示数量
    paginator = Paginator(event_list, 2)
    page = request.GET.get('page')
    try:
　　　　 # 返回Page类,返回第page页数据
        contacts = paginator.page(page)
    except PageNotAnInteger:
        # 如果page不是整数,取第一页数据
        contacts = paginator.page(1)
    except EmptyPage:
        # 如果page不在范围内,取最后一页数据
        contacts = paginator.page(paginator.num_pages)
　　 # 传给前端的参数就是 Page类
    return render(request,'event_manage.html',{'user':username,'events':contacts})


分页器页面

<!--分页器-->
<div class="pagination">
    <span class="step-links">
        {% if events.has_previous %}
        <a href="?page={{events.previous_page_number}}">上一页</a>
        {% endif %}
        {% if guests.paginator.count > 2 %}
        <span class="current">
            {{events.number}}  /  {{events.paginator.num_pages}}
        </span>
        {% endif %}
        {% if events.has_next %}
            <a href="?page={{events.next_page_number}}">下一页</a>
        {% endif %}
        <br>
         <span class="total">
            合计: {{events.paginator.count}}个发布会
        </span>
    </span>
</div>


Page类

def __init__(self, object_list, number, paginator):
    self.object_list = object_list
    self.number = number
　　 # 定义分页器,因此也可以通过Page调用分页器
    self.paginator = paginator

def has_next(self):
    return self.number < self.paginator.num_pages

def has_previous(self):
    return self.number > 1

def has_other_pages(self):
    return self.has_previous() or self.has_next()

def next_page_number(self):
    return self.paginator.validate_number(self.number + 1)

def previous_page_number(self):
    return self.paginator.validate_number(self.number - 1)

Paginator类

@cached_property
def count(self):
    """Return the total number of objects, across all pages."""
    c = getattr(self.object_list, 'count', None)
    if callable(c) and not inspect.isbuiltin(c) and method_has_no_args(c):
        return c()
    return len(self.object_list)

@cached_property
def num_pages(self):
    """Return the total number of pages."""
    if self.count == 0 and not self.allow_empty_first_page:
        return 0
    hits = max(1, self.count - self.orphans)
    return ceil(hits / self.per_page)